/*
 * Copyright (c) 2009 John Pritchard, WTKX Project Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package wtkx.ps;

/**
 * Run once closure to halt client from Wtkx threads.
 */
public final class Stop 
    extends Object
    implements Runnable
{

    private volatile Client client;

    public Stop(Client client){
        super();
        if (null != client){
            this.client = client;
            wtkx.ui.Threads.SetTimeout(this,1);
        }
        else
            throw new IllegalArgumentException();
    }

    public void run(){
        Client client = this.client;
        if (null != client){
            try {
                client.stop();
            }
            finally {
                this.client = null;
            }
        }
    }
}
